Our software update is now concluded. You will need to reset your password to log in. In order to do this, you will have to click "Log in" in the top right corner and then "Forgot your password?".
Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
But to get to all this normally, you should see your username in the top right corner of your screen, if you click that it will show a menu of this and more:
tbh I didn't even know that desktop mode was a thing for mobile
But a few things I can think of that may or may not be the problem:
-the site just doesn't like the link you're using
-the gif exceeds the allowed filesize
-there is some error in the BB code of your sig that is preventing it from displaying (if you could provide a screenshot please?)